Read the component amounts separately
A blend is two compounds sharing the same liquid. A label stating only a combined mass does not give enough information to calculate either compound's concentration. Find the separately stated amount of BPC-157 and TB-500 before entering values. The composition buttons are examples of labels, not suggestions about which blend to use.
When you select a component for the dose field, the other component still appears in the result. The tool does not treat the selected amount as a combined dose, and it cannot remove the second compound from a draw.
The blend formula
component concentration (mg/mL) = component mass (mg) ÷ final solution (mL) volume (mL) = selected component dose (mg) × final solution (mL) ÷ selected component mass (mg) U-100 units = volume (mL) × 100 each component amount (mg) = its mass in the vial (mg) × draw volume (mL) ÷ final solution (mL)
Convert micrograms to milligrams by dividing by 1,000. One U-100 unit is 0.01 mL. Changing syringe capacity does not change that conversion, but it changes whether the volume fits and the line spacing shown in the illustration. Results use unrounded inputs; displayed concentrations and amounts are rounded.
Equal and unequal blends: arithmetic examples
5 mg + 5 mg in 2 mL: each component is 2.5 mg/mL. A 10-unit draw is 0.1 mL and contains 0.25 mg (250 mcg) of BPC-157 and 0.25 mg (250 mcg) of TB-500. The combined amount is 0.5 mg, not 0.5 mg of each.
10 mg BPC-157 + 5 mg TB-500 in 2 mL: the concentrations are 5 mg/mL and 2.5 mg/mL. A 20-unit draw is 0.2 mL and contains 1 mg of BPC-157 plus 0.5 mg of TB-500. Selecting a TB-500 amount of 0.5 mg produces the same draw and shows both amounts. These values demonstrate the formula; they are not suggested doses or dilutions.
Compound identity and safety context
The FDA source was checked on November 5, 2026. Compounding policy and product approval are distinct questions. This page provides no preparation technique, treatment schedule or sourcing links.
Questions
Can I enter a total blend amount of 10 mg?
Only if you also know the component split. A total of 10 mg could mean 5 mg of each, 8 mg plus 2 mg, or another combination. Enter the two separately stated masses; this calculator does not assume equal parts.
What does 5 mg + 5 mg mean?
It means 5 mg of BPC-157 and 5 mg of TB-500, for 10 mg combined. It does not mean 10 mg of each. The composition buttons fill only these two mass fields; they leave your water volume and dose unchanged.
How many units is 250 mcg of BPC-157 in a blend?
There is no fixed answer. As an arithmetic example, 5 mg of BPC-157 plus 5 mg of TB-500 in 2 mL gives 2.5 mg/mL of each. A draw containing 250 mcg of BPC-157 is 0.1 mL, or 10 U-100 units, and also contains 250 mcg of TB-500. This example is not a dose recommendation.
Can the amounts of the two components be chosen independently?
Not from the same homogeneous solution. Both amounts change together with the draw volume. With 10 mg of BPC-157 and 5 mg of TB-500 in a vial, every draw has twice as much BPC-157 by mass.
How much bacteriostatic water should I add?
This calculator does not select a volume or give preparation instructions. Use a known final solution volume to calculate concentrations. Added water approximates final solution volume; it does not establish the contents or safety of a vial.
Does a correct calculation establish that a blend is safe?
No. The result assumes that both stated masses are accurate and that the solution is homogeneous. It cannot verify identity, purity, sterility, stability or suitability for human use. FDA has identified safety concerns for BPC-157 and thymosin beta-4 fragment.